Sleep is something we all do. But some people need to sleep more than others. Babies sleep most of the time. Children in school sleep about ten to twelve hours a night. Most adults sleep only seven or eight hours.{#blank#}1{#/blank#}All parts of our bodies have to rest after they work.. Our arms need a rest after we lift heavy thing, When we run fast, our legs work hard. They get tired. We have to rest them. Our brains workhard, too.{#blank#}2{#/blank#} We can sit quite still and rest our arms andlegs. But our brains aren't resting. They go right on thinking as long as weare awake.

      Our brains slow down a bit when we sleep and dream.{#blank#}3{#/blank#} Instead of thinking wide-awake thoughts, our brains make up dreams. Some dreams are very pleasing. Some are not. Most of thetime we forget them when we wake up.

      Scientists have tried to find out what would happen if people were not allowed to sleep. They asked some people not to go to bed. The people stayed up all night and all the next day. They stayed up the next night too,and the day after. They played games, but they made mistakes. They forgot things.{#blank#}4{#/blank#} The people grew rude and mean. They became angry with their friends. Finally they were too tired to stand up. When they sat down, they fell asleep.

Scientists have found that if people are not allowed to sleep and to dream, they act in an unusual way.{#blank#}5{#/blank#}But we do know that we need it to stay well. So tonight have a goodsleep. Lie down under the covers. Shut your eyes. Let your thoughts wander.Soon you'll stop thinking. You'll be asleep.

A. It was hard for their tired brains to work.

B. When we are awake, they help us pay attention to the worldaround us

C. But babies, children, and adults—all of us need to haveour sleep

D. Good sleep helps to improve one's memory

E. No one knows why sleep is so good for us

F. But even as we sleep our brains are doing some work

G. Of course you will have a good sleep

    Ebola is a dangerous virus that can cause people to get very sick and even die. The virus is causing the biggest problems in western Africa, where it has spread quickly. {#blank#}1{#/blank#} But it can get worse and cause life-threatening symptoms, such as bleeding and trouble breathing.

    {#blank#}2{#/blank#}

    Ebola does not spread like colds or the flu because it does not float through the air. Ebola also doesn't spread through food or water, like some other viruses. Instead, Ebola spreads when someone touches the body fluids (such as spit) of a sick person.

    {#blank#}3{#/blank#}

    An outbreak is when many people are getting sick with the same illness around the same time. You may have heard of a flu outbreak, which is when lots of people get sick from the same types of flu virus. When an outbreak happens because of a virus, more people could get sick because there is a lot of that virus around.

    Where did Ebola come from?

    Scientists aren't sure how the first person gets Ebola at the start of an outbreak. {#blank#}4{#/blank#} Tropical animals in Africa believed to carry the virus include great apes, chimpanzees, gorillas, monkeys, fruit bats, porcupines, and forest antelope.

    What do kids need to do about Ebola?

    Ebola is making many people sick in Africa, but no matter where you live, it's always a good idea to wash your hands well and often. {#blank#}5{#/blank#}

A. Why do I need to wash my hands?

B. How do people catch Ebola?

C. Ebola symptoms can start with fever and headache, kind of like the flu.

D. But they think that people may pick up the virus by touching or eating infected animals.

E. It's very important that infected people get treatment right away.

F. Keeping hands clean can help protect you from common illnesses like colds and the flu.

G. What is an outbreak?

    The UN has recognized the contributions of volunteers on Dec. 5, International Volunteer Day. Here, the four things are offered to consider before taking the leap into overseas volunteering.

    Choose your organization carefully

    {#blank#}1{#/blank#} volunteering may be a fundraising mechanism（筹资机制）for a development project. For others, volunteering is fundamental to their programs, and those serving take on professional roles in longer-term development.

    {#blank#}2{#/blank#}

    Volunteers want to help and make a difference, but most know this isn't a purely selfless act. You will learn new skills, broaden your horizons and come to better understand yourself and the world.{#blank#}3{#/blank#} Reflect on your motivations. You want to help reduce global poverty or protect the natural world, but what else? Have you always wanted to travel, but not as a tourist? Work with kids? When you understand your motivations, you'll be in a better position to choose the option that is right for you.

    Work alongside the local community

    Often times, travelers volunteer in isolation（隔离）from the local community in which they are working in.{#blank#}4{#/blank#} This enables you to ensure you are committing to a project that promotes long term and sustainable change.

    A volunteer trip is just the beginning

    {#blank#}5{#/blank#}Further ignite（点燃）the global change maker in you by taking your experience one step further when you return home. Spread the message of your transformative experience to others, helping to spark the change within them.

    For the rest of March, a disease will sweep across the US. It will keep kids home from school.{#blank#}1{#/blank#}Employees will suddenly lose their ability to concentrate.

    The disease, known as "March Madness", refers to the yearly 65 – team US men's college basketball tournament (锦标赛). {#blank#}2{#/blank#}Teams compete against each other in a single – elimination (单局淘汰) tournament that eventually crowns a national champion.

    Nearly 20 million Americans will find themselves prisoners of basketball festival madness. The fun comes partly from guessing the winners for every game. Friends compete against friends. {#blank#}3{#/blank#}Colleagues against bosses.

    Big – name schools are usually favored to advance into the tournament. But each year there are dark horses from little – known universities.

    This adds to the madness. Watching a team from a school with 3,000 students beat a team from a school with 30,000, for many Americans, is an exciting experience. Two years ago, the little – known George Mason University was one of the final four teams. {#blank#}4{#/blank#}

    College basketball players are not paid, so the game is more about making a name for their university and themselves.{#blank#}5{#/blank#}About $ 4 billion will be spent gambling (赌) on the event. According to Media Life magazine, the event will bring in $ 500 million in advertising income this year, topping the post – season income of every US professional league, including that of the NBA.

A. Husbands against wives.

B. The players will go all out for the games.

C. But that doesn't mean money isn't involved.

D. College students will ignore piles of homework.

E. People are willing to spend more money on watching it.

F. It begins on March 15 and lasts through the beginning of April.

G. Many people had never even heard of the university before the tournament.

    How old is "old"? {#blank#}1{#/blank#} Two hundred years ago, you were old at 35. That was the average life then. At the turn of this century, as medical knowledge advanced, the average life span(长度) increased to 45. In 1950, 70-year-olds were really old. Today, a healthy 70-year-old is looking forward to many more active years.

    So, how old is old? The answer is one you've heard many times, from all sorts of people. "You are as old (or young) as you feel!" The calendar(日历) simply tells you how many years you have lived. {#blank#}2{#/blank#}

    Once an unknown author wrote," {#blank#}3{#/blank#} Nobody grows old by living a number of years; people grow old by giving up their goals."

    {#blank#}4{#/blank#} Alice Brophy, when she was with the New York City commission for the Aging, said, "It upsets me when people say, 'Gee, you look young for your age!' What does that mean? Is there some model that you're supposed to look a certain way at 65 and 75 and 85? You know you can die old at 30 and live young at 80"

    There are many wrong ideas about aging. {#blank#}5{#/blank#} Here are some of the more common ones. For example, most older people are in poor health, or older people are unable to change.

A. It's extremely terrible to be grown old.

B. Youth is not a time of life but it is a state of mind.

C. These ideas stereotype(固化) people on the basis of age.

D. Old is a point of view.

E. Older people are stubborn, unable to change.

F. The answer has changed over the years.

G. Your body tells you how well you've lived.

A Few Universal Truths to Transform Your Life

    Life is growth. If you are not reaching the kind of success, the following Universal Truths are just the ones that help to change your life for the better, regardless of where you are, where you've been, or what challenges you are facing. {#blank#}1{#/blank#}

    The best way to achieve your desires is to set a goal. Sometimes we find ourselves "spinning our wheel", struggling through a day-to-day routine that isn't getting us anywhere because we don't know where we want to go. {#blank#}2{#/blank#} Whatever the case is, figuring out what your goals are and whether your current actions are helping to achieve them is important.

    {#blank#}3{#/blank#} Setting goals is important but isn't enough to drive you to the finishing line; it's important, too, to be able to imagine yourself as the achiever of your goals. How will you feel? Why is it worthwhile to follow these goals and not some other ones? If goals are the final result of a journey, your vision(愿景) is the fuel to get you there.

    {#blank#}4{#/blank#} Whether you regard yourself as a towering tree or a blade of grass, or whether you think you are a high mountain or a small stone, you represent a state of nature that has its own reason of existence. If you truly admire yourself, you'll be courageous.

    There is no better time to begin than now. {#blank#}5{#/blank#} But the truth is that your time is now. No matter what dream or desire you have, you are likely not to have more time in your life to make it happen.

A. Having a vision is undoubtedly necessary.

B. Self-appreciation gets you to be positive to move you towards success.

C. Try to understand and let it be the guide to your life as follows.

D. Be sure that you are more powerful than you know.

E. Read and allow them to change your life in beautiful ways.

F. Sometimes we simply do what is expected of us without considering what we want to achieve.

G. You can make a bunch of excuses that you'll start when more experienced or richer.